Dev-Team has just released RedSn0w 0.9.6rc7 with One-click boot option for tethered iOS 4.2.1 jailbreak devices. With RedSn0w 0.9.6rc7, there’s no need to select firmware files each time you need to boot your tethered jailbreak device.

Dev-Team explains: We’ve updated redsn0w to include “one-click” support for those of you running the tethered 4.2.1 jailbreak. Using command-line arguments, you can now bypass the screens you’d normally see as you use redsn0w to “Just boot tethered for now”.

This assumes both redsn0w and the IPSW are on your OS X desktop, so modify as necessary! Included in the zip is an example script file that you can double click on to launch redsn0w like this (the Windows example assumes everything is in C:\). (Mac users: please remember to change the permissions of your custom *.command files to allow execution.)

This should help ease the pain of the tethered jailbreak until @comex comes up with a 4.2.1 untether (or for those of you with legit access to the 4.2b3 IPSW, until the “Jailbreak Monte” untether is out of beta)!

hey i have got an iphone 4 wicth was running on i belive 4.1 and was jailbroken with green poison and i have updated my phone with out thinking to 4.2.1 and i have failed at trying to jailbreak it can any1 post anylinks that could help me out thanks

hi, am getting aboolutly nowhere!!! i can’t egt signal one way, and ther other way, well if i turn my phone off it’sa dud, with still no signal. i need some other way to jailbreak this iphone 3gs….please!